errno.h

 1/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
 2/*
 3 * Minimal errno definitions for NOLIBC
 4 * Copyright (C) 2017-2022 Willy Tarreau <w@1wt.eu>
 5 */
 6
 7/* make sure to include all global symbols */
 8#include "nolibc.h"
 9
10#ifndef _NOLIBC_ERRNO_H
11#define _NOLIBC_ERRNO_H
12
13#include <linux/errno.h>
14
15#ifndef NOLIBC_IGNORE_ERRNO
16#define SET_ERRNO(v) do { errno = (v); } while (0)
17int errno __attribute__((weak));
18#else
19#define SET_ERRNO(v) do { } while (0)
20#endif
21
22
23/* errno codes all ensure that they will not conflict with a valid pointer
24 * because they all correspond to the highest addressable memory page.
25 */
26#define MAX_ERRNO 4095
27
28#endif /* _NOLIBC_ERRNO_H */